Oil-test cock



L. M FISHER. OIL Iss1 cocx. APPLICATION FILED MAY 3.1920.-

Patented Feb. 15,-192-1.

UNITED STATES PATENTOFFICE.

LUTHER M. FISHER, OF ROCKYMOUNT, VIRGINIA.

OIL-TEST cook.

Specification of Letters Patent. Patented 15, 1921,

Application filed May 3, 1920. Serial No. 378,556.

T 0 all whom it may concern Be it known that I, LUTHER M. FISHER, acitizen of the United States, residing at Rockymount, in the county ofFranklin and State of Virginia, have invented certain new and usefulImprovements in Oil-Test Cocks, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to an improved oil test cock particularly adaptedfor use in connection with a crank casing of combustion engines ofautomobiles especially of the Ford type, and an object is to provide adevice of this kind, wherein simple, eiiicient, novel and practicalfeatures of construction are involved, and wherein the valve of the cockis automatically closed after opening the valve to test the level of theoil in the crank case. In other words, with an oil test cock of thistype, the oil cannot escape from the crank case unknowingly, for whenthe valve of the cock is open, means is afforded for automaticallyclosing.

Another object is to provide a device of this character, wherein thereis no way of for etting to leave the valve open.

IIeretofore a chauffeur when testing the level of the oil in the crankcase leaves the tap or valve open. Again the tap is sometimes turned oropened by a piece of brush or stick in the roadway. In either case theoil leaks from the crank case and damage will undoubtedly follow,therefore, a further object is to avoid these disadvantages orinconveniences and to provide a very simple, and efficient valve cock,which will automatically close after it has been once opened and thelevel of the oil tested.

While the design and construction at present illustrated and set forthis deemed preferable, it is obvious that as a result of a reduction ofthe invention to a more practical form for commercial purposes, theinvention may be susceptible to changes, and the right to these changesis claimed, provided they are comprehended within the scope of what isclaimed.

The invention comprises further features and combination of parts, aswill be hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view showing the improved oil test cock asapplied.

Fig. 2 is a sectional view through the sanll'p, showing the constructionof the valve 000 i Fig; 3' is across sectional view on line 33 of Fig.1.

lc'iig. 4 is a detail view of the lever 18; an

Fig. 5 is a detail perspective view of the valve 8 and its stem.

Referring to the'drawings, 1 designates a crank case of a conventionalform of internal combustion motor and 2 denotes the oil test cockcasing, which is threaded at 3 into the wall of the crank casing, and isprovided with a chamber 1. This chamber has an opening 5 through thethreaded part of the casing, communicating with the crank casing of themotor. The chamber 4: has a lateral opening 6 through which the level ofthe oil in the crank casing can be ascertained. The opening 5 has avalve seat 7 which is engaged by a valve 8 to prevent the escape of theoil from the crank casing. The valve 8 has a stem 9 which passes throughthe chamber 4, and is guided through a bushing 10, which is mounted inthe chamber 4. Interposed between the bushing and the valve 8 insurrounding relation to the stem is a coil spring 11 acting to normallyhold the valve 8 in engagement with its seat. The bushing 10 has agroove 12 extending perpendicular to its axis. This groove when thebushing is in proper place registers with an opening 13 extendingthrough one corner of the casing 2 so that the opening 13 and the groove12 may receive a suitable cotter pin 14 thereby holding the bushing inposition to hold the spring in place. Extending from the easing 2 is apair of spaced arms 15 provided with openings 16. A cotter pin 17engages through the openings 16 of the arms 15 and through a lever 18thereby pivotally mounting the lever between the arms. This lever 18 hasa finger piece 19 so that it may be engaged by the finger and tiltedupon its pivot. The other end of the lever has a cam edge 20 so as tocooperate with one end 21 of the slot 22 of the stem of the valve.Itwill be noted that by applying pressure on the finger plece end of thelever, the lever may be tilted and movement impartedto the stem, therebyunseat ing the valve, permitting the elevation of the oil in the crankcasing to be ascertained through the lateral opening of the casing 52.

The invention having been set forth, what is claimed as new anduseii'ulis 1.7 A test cock comprising an integral cas-' and the guide bushing,the end of the stem beyond the bushing having a slot, said integralcasing having an extension, a cam lever pivotally mounted on theextension and operatively engaging said slot, whereby upontilting thelever,the valve may be -unseated against the action of the spring.

2 A valve comprising a casing having a valve seat at one end, atensioned valve mounted in the casing and adapted to cooperate with theseat and provided with a stem, a guide bushing in the other endof thecasing for the stem, said bushing having'a groove, and a cotter pinpassing through one corner of the valve casing and engaging the groovein the bushing to retain the latter imposition. y

In testimony whereof I hereunto afliX' my signature. r

LUTHER u, FISHER, f

